Printing ribbon cassette



FIG. 1 is a front, top and right side perspective view of a printingribbon cassette, showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a rear view thereof; and

FIG. 7 is a bottom view thereof.

The ornamental design for a printing ribbon cassette, as shown anddescribed.